Insects, earthworms, fungi and bacteria form the key decomposers of the Savanna biome. Decomposers are organisms that help to break down organic matter, making nutrients available in the ecosystem.
The Savanna biome is characterized by a rolling grassland, with isolated trees and lots of shrubs. Also known as tropical grasslands, savannas do not receive as much rainfall as tropical forests but they receive more rainfall than deserts. The climate is typically divided into two, a long dry season and a short but very wet season. Insects, earthworms, fungi and bacteria contribute as decomposers in various ways.
Some of the major insects that help decompose include locusts, flies and beetles. Termites are also a major decomposer. They feed on dead leaves and help aerate the soil by their movement.
Despite the drier climate some species of earthworm are also capable of surviving in a Savanna. They feed on organic matter, breaking it down to simpler compounds.
Although not as common as in more humid biomes, fungi also play a part in decomposing organic matter. Common examples of fungi found in the Savanna include Artist Conks (ganoderma applanatum) and Dryad's Saddle (polyporous squamosus).
Lastly, bacteria are the major decomposers in the Savannah biome. The warm temperature allows them to flourish.